Fmoc-Asp-OtBu

Also known as: L-Fmoc-Aspartic acid alpha-tert-butyl ester, N-[(9H-Fluoren-9-ylmethoxy)carbonyl]-L-aspartic acid 1-tert-butyl ester, 1-tert-Butyl N-Fmoc-L-aspartate, N-Fmoc-L-aspartic acid 1-tert-butyl ester, (3S)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-[(2-methylpropan-2-yl)oxy]-4-oxobutanoic acid, MFCD00065631

Fmoc-Asp-OtBu (CAS 129460-09-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C23H25NO6 and a molecular weight of 411.448 g/mol. Key properties include a boiling point of 617.4±55.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 327.2±31.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 129460-09-9
Jingsj CID: J-31682-5
Molecular Formula: C₂₃H₂₅NO₆
Molecular Weight: 411.448 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	617.4±55.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	327.2±31.5 °C
Exact Mass	411.168182
PSA	101.93000
LogP	5.16
Vapor Pressure	0.0±1.9 mmHg at 25°C
Refractive Index	1.576

Activity & Biological Data

Additional Information	[1]. Luckose F, et al. Effects of amino acid derivatives on physical, mental, and physiological activities. Crit Rev Food Sci Nutr. 2015;55(13):1793-1144.

Customs & Trade Information

HS Code	2924299090
Summary	2924299090. other cyclic amides (including cyclic carbamates) and their derivatives; salts thereof. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Fmoc-Asp-OtBu?

The CAS number of Fmoc-Asp-OtBu is 129460-09-9.

What are the molecular formula and molecular weight of Fmoc-Asp-OtBu?

Fmoc-Asp-OtBu has molecular formula C23H25NO6 and molecular weight 411.448 g/mol.

What are the upstream and downstream products of Fmoc-Asp-OtBu?

For Fmoc-Asp-OtBu, Upstream Products: L-Aspartic acid, 9H-fluoren-9-ylmethyl 2,5-dioxopyrrolidine-1-carboxylate, Isobutylene; Downstream Products: H-Asp-OtBu, Fmoc-D-aspartic acid, fmoc-asn(ac3acnh-beta-glc)-oh.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Fmoc-Asp-OtBu (CAS 129460-09-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-31682-5 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.